Obviously, Carter had more than one set.

As stated, the ones I got came from the Engineering Dept.

At the same time, got the factory specifications book, with all of the car service bulletins, both Carter and the car manufacturers; plus a BUNCH of prototype carburetors. And the complete Carter school material (about 2700 indexed 35mm slides).

I had previously worked with some of the Carter engineers, and put together a complete listing of Carter carbs from number 1 (not complete, as they did not start numbering until the early 1920's). I also have a fairly complete list prior to when numbering began.

One of the prototypes was the prototype for the first WCFB 4-barrel. Some folks argue which came first; Carter WCFB, Rochester 4-GC, or Stromberg 4A. Not going to argue, because I don't know. I do have both the Carter and Stromberg prototypes. To me, the cream of the prototype crop was the WCFB, but some Cadillac folks might disagree, as I acquired a set of first production Cad V-16 new old stock (both the left and the right). Also included was the 1930 Chevrolet prototype, a first production 1953 Corvette YH, and a 1966 first production Corvair YH.

Pictures on some of this stuff are on my "virtual carburetor museum" : Carburetor virtual museum

Hopefully, I will able to identify the YF (but probably not until next fall) by casting number. I started a major project of an in-depth article on the YF's sold for Chevrolet, and I have about 200 of them put away, including at least one of every from the first one through 3211. But I had to pull off that project, as I have a Stromberg project which I consider more important. By fall 2022, I should have every single Stromberg drawing, and bill-of-material that survive digitized.

Then I can start back on Carter.

Carter did make some YF carbs that were identified by tag only. Once the tag was pitched, identification is (at least right now) virtually impossible.

The 630 base that you have was used on about a dozen carbs (most of them Willys, but a couple of Chevrolet). If you will get me the number from the metering rod, I can identify it at least far enough to cross it to one of my rebuilding kits.

Jon

Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify.
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